Cisco ISR4451-X/K9 Integrated Services Router

Equipment Overview

The Cisco ISR4451-X/K9 is a modular enterprise router from the Cisco ISR 4000 series, designed for medium-to-large branch offices and campus deployments. It provides integrated routing, security, and advanced WAN services in a single chassis. The platform supports concurrent services such as VPN, firewall, and application optimization without compromising throughput. Its modular architecture allows flexible interface configuration to adapt to evolving network requirements.

Main Parameters

• Form Factor: 2RU rack-mountable modular router
• Built-in Ports: 4 x Gigabit Ethernet (GE) ports
• Network Interface Modules (NIM): 3 slots for modular WAN/LAN connectivity
• Service Modules (SM): 2 slots for enhanced services (e.g., security, voice, WAN acceleration)
• Flash Memory: 8 GB onboard
• DRAM: 4 GB (default) with expansion capability
• Model/MPN: ISR4451-X/K9 (Cisco ISR 4451)

Key Advantages

This model is selected for enterprise projects due to its high modularity, enabling tailored interface combinations via NIM and SM slots. The integrated 4 GE ports provide immediate connectivity, while 8 GB flash and 4 GB DRAM ensure sufficient resources for concurrent routing and security services. It supports future upgrades through module insertion, extending the platform’s service life.

Compatibility & Integration

The router supports Cisco IOS XE software, providing consistent feature parity across the ISR 4000 family. It is compatible with standard enterprise networking protocols (e.g., OSPF, BGP, MPLS) and integrates with Cisco DNA and SD-WAN architectures. The NIM and SM slots accept Cisco-certified modules for Ethernet, T1/E1, DSL, and advanced security services.